Audemars Piguet & Cie: A 1930's gold and enamel keyless openface split-second chronograph pocketwatch made for Tiffany & Co., the back cover with black and white enamel monogram, the gilt dial with black Breguet numerals, subsidiary dials for running seconds and elapsed minutes, two sweep centre second hands operated by the winder and a second button in the band, the signed nickel plated bar movement with 8 adjustments and 22 jewels, bi-metallic balance and swanneck regulation, numbered 19500, under hinged cuvette, the case similarly signed and numbered